Create an univocal id in Java -


I have to create a client in Java. A customer has a name, an address, a telephone number and an ID that is the first is. I have implemented it in this way, I want to know that there is a better way to do this. 

  public class client {private string name; Private int codeau; Private string address; Private Int Newtel; Private int calculation = 1; Public Client (string name, int code, string address, int newtell) {this.name = name; This.codeU = codeU + count; This.address = address; This.numTel = numTel; Count ++; } Public int getCode () {return codiceU; }}

The second class that extends the client: 

  public class clientgold client {public clientgold (string name, int codeU, string address, int NewTel) is extensively {super (name, code u, address, newtail); // Todo Auto-Generated Constructor Stub}}

, stable counting , all updated values ​​will remain the same as all the examples of Cliente and this will increase.
Otherwise, counts will always be the same value, which is '1'.


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